Answer / purushottam kumar

r.m.s. value/average value

Answer / bpr

form factor=r.m.s. value/average value=1.11

Answer / harshi

form factor of an alternating current waveform is the ratio
of the rms value of the output voltage to the average value
of the output voltage

What is meant by cold loop test in instrument

0 Answers   Transnet,

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Phase control and integral control are used for?

0 Answers   NPCIL,

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What is floating earthing?

2 Answers   Equate,

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EXPLAIN WORKING PRINCIPLE OF ALTERNATOR & MOTORS.

2 Answers   L&T,

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carbon zinc cell voltage?

3 Answers  

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Is it advantages of having star-delta vfd than normal star vfd , if yes why?

0 Answers  

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We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.

2 Answers   KPTCL,

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Suppose an electric motor with a controller is not working. What is the sequence of testing you will do in your troubleshooting?

2 Answers   Emerson,

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Why frequency changes due to load variation in power system ? i.e why when load increases frequency decreases?

0 Answers   Madina Group,

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What voltage is used in Directional earth fault relay? and why?

5 Answers   L&T,

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Why earthing transformer used in Distribution Sub-Station?

3 Answers  

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can you use 400 volt 3 phase and neutral and earth equipment on 440 3 phase and earth supply safely and if so how?

2 Answers   Maersk,

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